Created the Tuesday 13 October 2020. Updated 2 months ago.

CLIPBRDWNDCLASS is a window class that is registered by the Object Linking & Embedding (OLE) library (ole32.dll) to handle clipboard data. When a window of this class is created, it is assigned a number of window properties that store the addresses of various interfaces that are used to process clipboard data. These interfaces include the ClipboardDataObjectInterface, ClipboardRootDataObjectInterface, and ClipboardDataObjectInterfaceMTA.

One of these interfaces, the ClipboardDataObjectInterface, can be leveraged for code injection. If this interface is set to the address of an IUnknown interface and the clipboard window procedure receives a WM_DESTROYCLIPBOARD message, it will invoke the Release method of the IUnknown interface. This can potentially allow malware to inject code into the host system by manipulating the clipboard data and causing the Release method to be called.

It is important to note that the CLIPBRDWNDCLASS window class and the interfaces it uses are private to the OLE library, and are not intended for use by external programs.

Featured Windows API's

Below, you will find a list of the most commonly used Windows API's that are currently utilized by malware authors for current evasion technique. This list is meant to provide an overview of the API's that are commonly used for this purpose. If there are any API's that you feel should be included on this list, please do not hesitate to contact us. We will be happy to update the list and provide any additional information or documentation that may be helpful.

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Additional Resources

External Links

The resources provided below are associated links that will give you even more detailed information and research on current evasion technique. It is important to note that, while these resources may be helpful, it is important to exercise caution when following external links. As always, be careful when clicking on links from unknown sources, as they may lead to malicious content.

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